Fig. 4
From: The Sino-Himalayan flora evolved from lowland biomes dominated by tropical floristic elements
Temporal patterns of HTratio and endemic taxa of angiosperms in three floristic regions. a The ratio of tropical to temperate floristic elements is represented by the HTratio. For HTratio definition, refer to Fig. 3. Lines with different colors represent three floristic regions (the Yunnan Plateau, Hengduan Mountains, and East Himalaya) within the Sino-Himalaya. b Changes in divergence of endemic genera and species in the three floristic regions over geological time. The number of diverged endemic genera and species are shown as dotted lines and solid lines, respectively